Hi WhathappenedtotheLego,
DS is doing joint MFL/English at Manchester. I don't think that's the uni that would suit your quiet DD (though remember they do grow up...), but here are a few thoughts:
DS says that joint honours can be quite restricting for choice of module. By the time you've taking all the compulsory modules for both subjects, you may not have much left that doesn't clash.
Deadlines can also be uncoordinated.
He looked at Swansea - which was very friendly, and sounded utterly reassuring and supportive for the less outgoing student. The town centre was underwhelming, but the beach and views were great.
Cardiff also sounded good and had realistic offers. They offered him a place as a late applicant, and were very helpful.
I like Lancaster. Friends' children loved it. DS and DD really didn't and refused to apply. Their language courses are heavily biased towards language, not literature, as far as I remember.
York - again, a friend's very studious DD seems happy there!
How about Exeter?